Hey Incendar.com, Incendar here! So it's cute, but is the hedgehog pet P2W and worth getting?

The hedgehog pet will increase items gathered when it procs, which can double gather results.
Make sure to get it to level 10 fast, as this also has an influence (set to aggressive then passive when level 10).

As the chart above will show you (multiple testers), highest tier is the only thing that matters.
4x T1 hedgehogs is the same as 1 T1, T1 and T2 are the same. 1x T4 hedgehog is the highest possible proc rate.

So is it P2W? Well, that depends if you gather or not. If you do so, yes.
A T1 hedgehog will increase your base item gathering by 30%.
Be aware it does not increase shards drop rates.